Vista: Ultimate or Home Premium?

Main restrictions in Home Premium:
- no bitlocker
-no EFS (encrypting file system)
- no group policy management ( so no admin management for users accounts or local security for instance)
- one way remote desktop (Home Premium can control an Ultimate system remotely, but Ultimate cannot connect to Home Premium, probably to protect average users of Home Premium). Remote assistance still works both ways.
- Downloadable Ultimate Extras (new features you get through Windows Update), well as the name says, only available for Ultimate lol.

Now the worse, don't know if that's just funny or sad, is that for instance the EFS function appears in Home Premium, but grayed. The local security management console is there, but when you click on it you get the message: Sorry, you're running Vista Home Premium, and this feature is not available, Upgrade to Ultimate. As you know all DVDs are the same, you just got to order an upgraded version online to get a new key and unlock features (it's called "Anytime Upgrade"). By the way Ultimate (Retail and Upgrade versions) has 2 DVDs in the package: 64 and 32 bit. Ultimate OEM contains only one version.
So it's up to you to buy the version that matches your needs, and the money you wanna spend. If you think you might wanna use Ultimate advanced features, OK, if not, then Home Premium will be enough. You'll still get AERO (with a suitable graphic card) and UAC for security. Home Premium is to Ultimate exactly what XP home was to XP pro. That also means, obviously (for those of you who might have doubted that), that XP pro has advanced features that Vista Home Premium does not have.
I have to admit that the way Microsoft handles all those different versions of Vista (Ultimate, Home Premium, 64 or 32 bit) does not meet what I could have expected from them. Don't know if that was the same with XP home, cause I never saw it, but showing disabled features to the user, in what is supposed to be a limited, but still a full featured OS is not really fair.
It's kinda promoting more expensive products from the same company,through the use of a restricted OS version, and put the end user under pressure. I call that Adware.